Okay, technically the spell from the game is called "Rain" and not control weather. But Control Weather really needs to be used responsibly. Or irresponsibly depending on your level of maturity. Not that it can't be used for good and awesome. It's just the possibilities for annoying people are much higher. Rain when you don't want it? Check. Tornadoes? Check. Straight line Winds? Check. The chances for mischief and destruction are incredibly high. Which is why you should ban this spell in your games.